Revert of Implement Porter Duff XP with a blend table

include/gpu/GrColor.h

Index: include/gpu/GrColor.h
diff --git a/include/gpu/GrColor.h b/include/gpu/GrColor.h
index 9ccc638fc9fe6745d58ac954e13169e2dcb58394..f5757b93f5e902c8f3d94a8b3a045b37f5c580f2 100644
--- a/include/gpu/GrColor.h
+++ b/include/gpu/GrColor.h
@@ -142,16 +142,12 @@
     kB_GrColorComponentFlag = 1 << (GrColor_SHIFT_B / 8),
     kA_GrColorComponentFlag = 1 << (GrColor_SHIFT_A / 8),
 
-    kNone_GrColorComponentFlags = 0,
-
     kRGB_GrColorComponentFlags = (kR_GrColorComponentFlag | kG_GrColorComponentFlag |
                                   kB_GrColorComponentFlag),
 
     kRGBA_GrColorComponentFlags = (kR_GrColorComponentFlag | kG_GrColorComponentFlag |
                                    kB_GrColorComponentFlag | kA_GrColorComponentFlag)
 };
-
-GR_MAKE_BITFIELD_OPS(GrColorComponentFlags)
 
 static inline char GrColorComponentFlagToChar(GrColorComponentFlags component) {
     SkASSERT(SkIsPow2(component));